TW200620853A - Multi-pass video encoding - Google Patents

Multi-pass video encoding

Info

Publication number
TW200620853A
TW200620853A TW094121232A TW94121232A TW200620853A TW 200620853 A TW200620853 A TW 200620853A TW 094121232 A TW094121232 A TW 094121232A TW 94121232 A TW94121232 A TW 94121232A TW 200620853 A TW200620853 A TW 200620853A
Authority
TW
Taiwan
Prior art keywords
images
encoding
encoding operation
video encoding
encodes
Prior art date
Application number
TW094121232A
Other languages
Chinese (zh)
Other versions
TWI325697B (en
Inventor
Xin Tong
Hsi-Jung Wu
Thomas Pun
Adriana Dumitras
Barin Geoffry Haskell
Jim Normile
Original Assignee
Apple Computer
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Apple Computer filed Critical Apple Computer
Publication of TW200620853A publication Critical patent/TW200620853A/en
Application granted granted Critical
Publication of TWI325697B publication Critical patent/TWI325697B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/146—Data rate or code amount at the encoder output
    • H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/189—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
    • H04N19/192—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding the adaptation method, adaptation tool or adaptation type being iterative or recursive
    • H04N19/194—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding the adaptation method, adaptation tool or adaptation type being iterative or recursive involving only two passes

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

Some embodiments of the invention provide a multi-pass encoding method that encodes several images (e.g., several frames of a video sequence). The method iteratively performs an encoding operation that encodes these images. The encoding operation is based on a nominal quantization parameter, which the method uses to compute quantization parameters for the images. During several different iterations of the- encoding operation, the method uses several different nominal quantization parameters. The method stops its iterations when it reaches a terminating criterion (e.g., it identifies an acceptable encoding of the images).
TW094121232A 2004-06-27 2005-06-24 Multi-pass video encoding TWI325697B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US58341804P 2004-06-27 2004-06-27
US64391805P 2005-01-09 2005-01-09
US11/118,616 US8406293B2 (en) 2004-06-27 2005-04-28 Multi-pass video encoding based on different quantization parameters

Publications (2)

Publication Number Publication Date
TW200620853A true TW200620853A (en) 2006-06-16
TWI325697B TWI325697B (en) 2010-06-01

Family

ID=35599372

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094121232A TWI325697B (en) 2004-06-27 2005-06-24 Multi-pass video encoding

Country Status (2)

Country Link
US (2) US8406293B2 (en)
TW (1) TWI325697B (en)

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Also Published As

Publication number Publication date
US20120250761A1 (en) 2012-10-04
US8406293B2 (en) 2013-03-26
US20060013298A1 (en) 2006-01-19
TWI325697B (en) 2010-06-01
US8811475B2 (en) 2014-08-19

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